Add missing_code_block_language_in_doc_comment lint to flutter/packages.

analysis_options.yaml

@@ -112,6 +112,7 @@ linter:
     # - lines_longer_than_80_chars # not required by flutter style
     - literal_only_boolean_expressions
     # - matching_super_parameters # blocked on https://github.com/dart-lang/language/issues/2509
+    - missing_code_block_language_in_doc_comment
     - missing_whitespace_between_adjacent_strings
     - no_adjacent_strings_in_list
     - no_default_cases

packages/flutter_migrate/lib/src/base/common.dart

@@ -63,7 +63,7 @@ String getEnumName(dynamic enumItem) {
 /// Rationale:
 ///
 /// Consider the following snippet:
-/// ```
+/// ```dart
 /// try {
 ///   await foo();
 ///   ...
@@ -87,7 +87,7 @@ String getEnumName(dynamic enumItem) {
 /// [asyncGuard] is intended to wrap awaited expressions occurring in a `try`
 /// block. The behavior described above gives the behavior that users
 /// intuitively expect from `await`. Consider the snippet:
-/// ```
+/// ```dart
 /// try {
 ///   await asyncGuard(() async {
 ///     var c = Completer();

packages/flutter_migrate/lib/src/base/logger.dart

@@ -1125,7 +1125,7 @@ class SpinnerStatus extends AnonymousSpinnerStatus {
 /// ```
 ///
 /// yields:
-/// ```
+/// ```none
 ///   Usage: app main_command <subcommand>
 ///          [arguments]
 /// ```

packages/go_router/lib/src/route.dart

@@ -77,15 +77,15 @@ typedef ExitCallback = FutureOr<bool> Function(
 /// with the sub routes.
 ///
 /// For example these routes:
-/// ```
+/// ```none
 /// /         => HomePage()
 ///   family/f1 => FamilyPage('f1')
 ///     person/p2 => PersonPage('f1', 'p2') ← showing this page, Back pops ↑
 /// ```
 ///
 /// Can be represented as:
 ///
-/// ```
+/// ```dart
 /// final GoRouter _router = GoRouter(
 ///   routes: <GoRoute>[
 ///     GoRoute(
@@ -122,12 +122,14 @@ typedef ExitCallback = FutureOr<bool> Function(
 ///     ),
 ///   ],
 /// );
+/// ```
 ///
 /// If there are multiple routes that match the location, the first match is used.
 /// To make predefined routes to take precedence over dynamic routes eg. '/:id'
-/// consider adding the dynamic route at the end of the routes
+/// consider adding the dynamic route at the end of the routes.
+///
 /// For example:
-/// ```
+/// ```dart
 /// final GoRouter _router = GoRouter(
 ///   routes: <GoRoute>[
 ///     GoRoute(
@@ -145,9 +147,10 @@ typedef ExitCallback = FutureOr<bool> Function(
 ///   ],
 /// );
 /// ```
-/// In the above example, if /family route is matched, it will be used.
-/// else /:username route will be used.
-/// ///
+///
+/// In the above example, if `/family` route is matched, it will be used.
+/// else `/:username` route will be used.
+///
 /// See [main.dart](https://github.com/flutter/packages/blob/main/packages/go_router/example/lib/main.dart)
 @immutable
 abstract class RouteBase with Diagnosticable {
@@ -327,7 +330,7 @@ class GoRoute extends RouteBase {
   /// The path of this go route.
   ///
   /// For example:
-  /// ```
+  /// ```dart
   /// GoRoute(
   ///   path: '/',
   ///   pageBuilder: (BuildContext context, GoRouterState state) => MaterialPage<void>(
@@ -352,7 +355,7 @@ class GoRoute extends RouteBase {
   /// A page builder for this route.
   ///
   /// Typically a MaterialPage, as in:
-  /// ```
+  /// ```dart
   /// GoRoute(
   ///   path: '/',
   ///   pageBuilder: (BuildContext context, GoRouterState state) => MaterialPage<void>(
@@ -369,7 +372,7 @@ class GoRoute extends RouteBase {
   /// A custom builder for this route.
   ///
   /// For example:
-  /// ```
+  /// ```dart
   /// GoRoute(
   ///   path: '/',
   ///   builder: (BuildContext context, GoRouterState state) => FamilyPage(
@@ -391,7 +394,7 @@ class GoRoute extends RouteBase {
   /// This method can be useful it one wants to launch a dialog for user to
   /// confirm if they want to exit the screen.
   ///
-  /// ```
+  /// ```dart
   /// final GoRouter _router = GoRouter(
   ///   routes: <GoRoute>[
   ///     GoRoute(
@@ -542,7 +545,7 @@ class ShellRouteContext {
 /// passed to the /b/details route so that it displays on the root Navigator
 /// instead of the ShellRoute's Navigator:
 ///
-/// ```
+/// ```dart
 /// final GlobalKey<NavigatorState> _rootNavigatorKey =
 ///     GlobalKey<NavigatorState>();
 ///
@@ -601,7 +604,7 @@ class ShellRouteContext {
 ///
 /// For example:
 ///
-/// ```
+/// ```dart
 /// ShellRoute(
 ///   builder: (BuildContext context, GoRouterState state, Widget child) {
 ///     return Scaffold(
@@ -739,7 +742,7 @@ class ShellRoute extends ShellRouteBase {
 /// accomplished by using the method [StatefulNavigationShell.goBranch], for
 /// example:
 ///
-/// ```
+/// ```dart
 /// void _onItemTapped(int index) {
 ///   navigationShell.goBranch(index: index);
 /// }
@@ -1059,7 +1062,7 @@ typedef ShellNavigationContainerBuilder = Widget Function(BuildContext context,
 /// where the List of Widgets represent the Navigators for each branch.
 ///
 /// Example:
-/// ```
+/// ```dart
 /// builder: (BuildContext context, GoRouterState state,
 ///     StatefulNavigationShell navigationShell) {
 ///   return StatefulNavigationShell(

packages/go_router/lib/src/state.dart

@@ -102,7 +102,7 @@ class GoRouterState {
   ///
   /// To access GoRouterState from a widget.
   ///
-  /// ```
+  /// ```dart
   /// GoRoute(
   ///   path: '/:id'
   ///   builder: (_, __) => MyWidget(),

packages/google_sign_in/google_sign_in/lib/testing.dart

@@ -10,7 +10,7 @@ import 'package:flutter/services.dart' show MethodCall;
 ///
 /// Example usage:
 ///
-/// ```
+/// ```dart
 /// GoogleSignIn googleSignIn;
 /// FakeSignInBackend fakeSignInBackend;
 ///

packages/local_auth/local_auth/example/windows/flutter/ephemeral/.plugin_symlinks/local_auth_windows

@@ -0,0 +1 @@
+/usr/local/google/home/kallentu/.pub-cache/hosted/pub.dev/local_auth_windows-1.0.10/

packages/rfw/lib/src/dart/binary.dart

@@ -220,7 +220,7 @@ Uint8List encodeLibraryBlob(RemoteWidgetLibrary value) {
 ///
 ///   For example, this switch:
 ///
-///   ```
+///   ```none
 ///   switch (args.a) {
 ///    0: 'z',
 ///    1: 'o',